diff --git a/compiler/utils/assembler.cc b/compiler/utils/assembler.cc
index b016e74..6d8a989 100644
--- a/compiler/utils/assembler.cc
+++ b/compiler/utils/assembler.cc
@@ -80,10 +80,11 @@
 }
 
 
-void AssemblerBuffer::ExtendCapacity() {
+void AssemblerBuffer::ExtendCapacity(size_t min_capacity) {
   size_t old_size = Size();
   size_t old_capacity = Capacity();
   size_t new_capacity = std::min(old_capacity * 2, old_capacity + 1 * MB);
+  new_capacity = std::max(new_capacity, min_capacity);
 
   // Allocate the new data area and copy contents of the old one to it.
   uint8_t* new_contents = NewContents(new_capacity);